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April 23, 2014

Homework Help: Pre-Calculus

Posted by Shreya on Tuesday, October 2, 2012 at 1:34am.

Rational Functions

does the following function have a hole or a vertical asymptote or both? how do you know? find the y-value at that point.

y=x^2+7x+12/x^2+8x+15

I factored this out to

y = (x+3)(x+4)/(x+5)(x+3)
The x+3's cancelled out. I dont get the whole verticle and horizontal asymptote stuff, how do u know w/o using technology whether there is an asymptote and if there is a hole?

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